Improvement in pumps for oil-wells



PATENT @Trient WALTER S. WILKINSON, OF BALTIMORE, MARYLAND.y y

IIVIPROVEIVI ENT IN PUMPS FOR OIL-WELLS.

Specification forming part of Letters Patent No. 52,947, dated FebruaryQ7, 1866.

To all whom it may concern:

Be it known that I, WALTER S. WILKIN- SON, of the city of Baltimore,county of Baltimore, and State of Maryland, have invented new and usefulImprovements in Pumps; and I do hereby declare the following to be anexact description thereof, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon, making a partof this specification.

The nature of my invention consists in the use of a cone attached to ahollow screw operating on side wedges anda packing-cylinder for thepurpose of fastening the pump in the well.

Figure l exhibits a vertical section of an oil-well and of my pump inposition for pumping. Fig. 2 is a cross-section of the pump on theline l2 on Fig. 1, showing the position of the three wedges. Fig. 3 is a topview of the pump with the packing removed, showing the hollow screw andacross-section of the pistonrod. Fig. 4 is a top View of the conc,showing the plate for fastening the hollow screw to it.

My invention is a self-fastening pump for Artesian, salt, and oil wells,described and operated as follows:

The barrel A of the pump is made nearly of the same diameter as the wellinto which it is to be inserted. Of the valves it is only necessary tosay that they both open upward, that one is in the bottom of the pumpand the other in the piston N. They may be constructed of any desiredform.

The piston-rod B is tubular, and used as a pipe to conduct the liquidbeing pumped to the point at which it is desired to dischargeit.

Three springs, C, are attached to the outside ofthe barrel for thepurpose ot' preventing the barrel from revolving during the operation offastening the pump.

The three wedges D, of hard wood or metal, are inserted through the sideof the pump t0- ward the center in three slots eorrespondin g iu lengthand breadth to the length and thickness ofthe wedges. The wedges aremaintained in their position by means of the springs E pressing uponeach end of them from the outside, and the cone F, resting between themon the inside.

The cone is attached by means of a plate,

Gr, and flange a, or other simple device, to the hollow screw H, whichhas a thread cut on its outside the whole length of it, which threadworks in a corresponding thread in the top of the pump I, which forms anut for the screw. The hole through this screw is Octagonal, or of someother angular cross-section, and the piston-rod B is made of acorresponding outward cross-section titting in the screw, so as when thepiston-rod is turned around it will cause the screw to turn also, at thesame time allowing the piston-rod to move upward and downward in theoperation of pumping without disturbing the screw in its position.

When it is desired to secure the pump in a well itis lowered to thepoint at which it is t0 be fastened. The piston-pipe B is taken hold ofby apairjof ordinary gas-pipe tongs above the top of the well, and it isturned around to the right. This turns the hollow screw H in its nut Iand causes it to descend with the cone F, which is attached to the lowerend of thehscrewfthelcone forcing the wedgesD outward. The screwing iscontinued until the wedges are brought to bear against the wall ofthewell with sufficient force to maintain the pump in its position duringthe operation of pumping. The packing-cylinder K, of lead or otherflexible metal, is then driven down on the circular head b of the pumpby means 0f the coupling L of the piston-pipe, which rests upon the topof the cylinder M, to which the packing K is attached.

The driving down of the cylinder L is accomplished through blows givenupon the top of the piston and pipe B at the top ofthe well. Thisdriving is continued until thelead has been driven down and expandedsufficiently to form a joint with the wall of the well at the point Kand prevent the passage of the Water by the pump,

When it is desired to remove the pump from the well the piston-rod pipeB is turned toward the left until the cone F is drawn up from betweenthe wedges D, when thesprings E force the wedges D in toward the centerof the pump. The turning ot' the rod and screw toward the left iscontinued until the upper end of the hollow screw H comes in contactwith the under side of the head of the cylinder M and raises the packingK up from the seat b on the top of the pump, thus freeing the pump fromany serious impediment to its 2. The combination and arrangement of thewithdrawal from the well. paoking-oylinderK and the screw H and theWha-t I claim as my invention, and desire to coupling L of thepiston-pipe B, as herein (lesecure by Letters Patent, is scribed, andfor the purpose set forth.

1. The cone F, attached to 2. hollow screw, H, W. S. VILKINSON. incombination with two or more wedges,rl), Witnesses: operated in themanner and. for the purposes I. y' [iRAINIsLIN REIGART, substantially asherein set forth. GEO. W. SHOWAEN.

